JPH03236128A - Gas breaker - Google Patents

Gas breaker

Info

Publication number
JPH03236128A
JPH03236128A JP2961090A JP2961090A JPH03236128A JP H03236128 A JPH03236128 A JP H03236128A JP 2961090 A JP2961090 A JP 2961090A JP 2961090 A JP2961090 A JP 2961090A JP H03236128 A JPH03236128 A JP H03236128A
Authority
JP
Japan
Prior art keywords
gas
cylinder
flow path
passage
area
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2961090A
Other languages
Japanese (ja)
Inventor
Osamu Koyanagi
修 小柳
Yasuharu Seki
関 保春
Masanori Tsukushi
正範 筑紫
Yukio Kurosawa
黒沢 幸夫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP2961090A priority Critical patent/JPH03236128A/en
Publication of JPH03236128A publication Critical patent/JPH03236128A/en
Pending legal-status Critical Current

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  • Circuit Breakers (AREA)

Abstract

PURPOSE:To improve breaking capacity by making the flow passage of a gas breaker, where the opening of the flow passage from the hollow nozzle provided in a needle is arranged at the side of a cylinder, into the shape of a Laval nozzle. CONSTITUTION:A cylinder 7 is provided, being divided into a needle base 7a, where a main needle 2 and a needle 4 are placed, and a buffer cylinder 10, and air intake ports are provided apart in three places, and flow passage 9 and openings 10 are provided in three places between the air intake ports. By enlarging the area of the air intake port 14 for blasting gas from a buffer chamber 13 to arc as far as possible and making the passage 9 into the shape of a Labal tube to secure the area of the passage 9, it has solved the magnitudes of the area of the air intake port 14 and that of the passage 9 in contradictory relation. That is, by putting it in the shape of a Laval nozzle, the gas flow speed can be increased, and a limited space can be used effectively, and by the increase of gas flow, interrupting capacity can be improved.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、ガス遮断器に係り、特に、大容量遮断器に必
須のダブルフロ一方式の遮断部の改良に関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a gas circuit breaker, and particularly to an improvement of a double-flow one-way type circuit breaker essential to a large-capacity circuit breaker.

〔従来の技術〕[Conventional technology]

ガス遮断器で主流を占めているバッファ式における低操
作力化は、アーク熱を積極的に利用して消弧性ガス圧力
を上昇させ、ガス圧縮のための機械的外力を低減する自
刃消弧型併用方式によるものが一般的になって来ている
。また、バッファ式では、固定子側と可動子側の双方に
高圧となったガスを吹付けるダブルフロ一方式が大電流
遮断に必須の技術である。
The buffer type, which is the mainstream type of gas circuit breakers, has low operating force, and the self-blade arc extinguishing system actively utilizes arc heat to increase arc extinguishing gas pressure and reduces the external mechanical force for gas compression. Type combination methods are becoming common. In addition, in the buffer type, the double flow type, which sprays high-pressure gas on both the stator side and the mover side, is an essential technology for interrupting large currents.

以上のことから、ダブルフロ一方式で、アーク熱によっ
て高圧となったガスをより効果的にアークに吹付けるバ
ッファ式遮断部の構成が特願平1−166997号明細
書で提案されている。以下、その従来技術例について、
第5図ないし第7図を用いて説明する。
In view of the above, Japanese Patent Application No. Hei 1-166997 proposes a structure of a double-flow one-sided buffer-type interrupter that more effectively sprays gas that has become high-pressure due to arc heat onto the arc. Below is an example of the prior art.
This will be explained using FIGS. 5 to 7.

第5図は投入状態を示す。遮断部は、主に電流通電のた
めの主固定子1.主可動子2と、固定子3、可動子4.
絶縁ノズル5.可動子4の内側に設けられた中空ノズル
6に連通してシリンダ7の側面に開口部8をもつ流路9
.小形のバッファシリンダ10と固定ピストン11等か
ら構成されるシリンダ7の外周部には、開口部8を適切
な遮断動作位置まで閉止する排気ガイド12が設けられ
ている。ここで13はバッファ室、14は給気口、15
は排気口である。
FIG. 5 shows the charging state. The interrupting section mainly consists of the main stator 1 for current supply. Main mover 2, stator 3, mover 4.
Insulated nozzle5. A flow path 9 that communicates with a hollow nozzle 6 provided inside the mover 4 and has an opening 8 on the side surface of the cylinder 7.
.. An exhaust guide 12 is provided on the outer periphery of the cylinder 7, which is composed of a small buffer cylinder 10, a fixed piston 11, etc., and closes the opening 8 to an appropriate shutoff position. Here, 13 is a buffer chamber, 14 is an air supply port, and 15
is an exhaust port.

第6図は遮断動作の初期状態を示す。固定子3と可動子
4の間にアーク16が発生し、シリンダ7内とバッファ
室13の消弧性ガスを加熱するが、可動子4側の開口部
8は排気ガイド12によって閉止されているので、この
時点での中空ノズル6からの無駄なガス流は生じない。
FIG. 6 shows the initial state of the shutoff operation. An arc 16 is generated between the stator 3 and the mover 4 and heats the arc-extinguishing gas in the cylinder 7 and the buffer chamber 13, but the opening 8 on the mover 4 side is closed by the exhaust guide 12. Therefore, no wasteful gas flow is generated from the hollow nozzle 6 at this point.

このため、アーク熱を圧力上昇に効率良く使用すること
ができる。
Therefore, arc heat can be efficiently used to increase pressure.

第7図は遮断動作中期を示す。固定子3が絶縁ノズル5
を抜は出す付近で、可動側の開口部8も排気ガイド12
に設けられた排気口15により開口するため、固定側と
可動側の双方にガス流がほぼ同時に発生してアーク16
を消弧する。
FIG. 7 shows the middle stage of the shutoff operation. Stator 3 is insulated nozzle 5
The opening 8 on the movable side is also connected to the exhaust guide 12 near where it is pulled out.
Since the gas flow is opened by the exhaust port 15 provided in the
Extinguish the arc.

以上の従来技術例によれば、可動側の流路9が短縮され
たことによる流路抵抗の低減、または、流路面積や開口
部8の面積設定の自由度増大等から、アーク16に対す
る効果的がガス吹付けが可能なダブルフロ一方式とする
ことができる。
According to the above prior art example, the effect on the arc 16 is due to the reduction in flow path resistance due to the shortening of the flow path 9 on the movable side, or the increase in the degree of freedom in setting the flow path area and the area of the opening 8. The target can be a double flow type that allows gas spraying.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

しかし、上記従来技術例は、流路に対する流路形状等の
考慮がされでおらず、さらに、遮断性能を向上して高電
圧、大電流化を達成するためにはその流路の改善による
ガス流量の増大が望まれていた。
However, the above prior art example does not take into account the flow path shape, etc., and furthermore, in order to improve the interrupting performance and achieve high voltage and large current, it is necessary to improve the flow path. It was desired to increase the flow rate.

本発明の目的は、流路の改善により遮断性能を向上し、
さらに大容量化を図ったガス遮断器を提供することにあ
る。
The purpose of the present invention is to improve the blocking performance by improving the flow path,
Another object of the present invention is to provide a gas circuit breaker with a larger capacity.

〔課題を解決するための手段J 上記目的を達成するために、本発明は流路をラバール管
形状、または、流路の断面形状を四角形としたものであ
る。
[Means for Solving the Problems J] In order to achieve the above object, the present invention provides a flow path having a Laval tube shape, or a flow path having a rectangular cross-sectional shape.

〔作用〕[Effect]

本発明は流路をラバール管形状とすることでガス流速を
増大することができるので、ガス流量を増加することが
可能となる。また、流路の断面形状を四角形とすること
でも、円形に比べて流路面積を大きく設定できることか
ら、ガス流量を増加することができる。
In the present invention, the gas flow rate can be increased by making the flow path into a Laval tube shape, so it is possible to increase the gas flow rate. Moreover, by making the cross-sectional shape of the flow path square, the flow path area can be set larger than that of a circular cross-sectional shape, so that the gas flow rate can be increased.

〔実施例〕〔Example〕

以下、本発明の実施例を第1図ないし第4図により説明
する。
Embodiments of the present invention will be described below with reference to FIGS. 1 to 4.

第1図は、従来技術例での第5図と同様に、遮断部を投
入状態で示した。従来技術例と異なる点は、シリンダ7
を主可動子2.可動子4を設置した可動子台?a、バッ
ファシリンダ10とに分割して設けたところにある。第
2図には可動子台7aを固定子3側から見た斜視図を示
した。本実施例では、給気口14を三箇所に分けて設け
、その給気口14間に流路9と開口部10を三箇所設置
している。
FIG. 1 shows the cutoff section in the closed state, similar to FIG. 5 in the prior art example. The difference from the prior art example is that the cylinder 7
The main mover 2. Movable base with mover 4 installed? a and the buffer cylinder 10. FIG. 2 shows a perspective view of the movable child base 7a viewed from the stator 3 side. In this embodiment, the air supply ports 14 are provided at three separate locations, and the flow passages 9 and the openings 10 are provided at three locations between the air supply ports 14.

ここで、バッファ室13からのアークへの吹付はガス流
量を決定する給気口14面積は出来る限り大きく設定す
る必要がある。これに対して、流路9の流路面積も確保
しなければならず、開口部10をシリンダ7の側面に設
ける方式では、給気口14の面積と流路9の面積の大き
さは相反する関係にある。よって、流路9の形状は、決
められた空間において効率の良い流路形状を採用する必
要がある。第2図に示した実施例では、流路9をラバー
ル管形状としている。本実施例によれば、ラバール管形
状とすることでガス流速を増大することができ、決めら
れた空間を有効に使用することができる。ガス流速の増
大によってガス流量が増加することから、遮断性能を向
上することができる。
Here, the area of the air supply port 14 that determines the gas flow rate for spraying from the buffer chamber 13 onto the arc needs to be set as large as possible. On the other hand, the flow path area of the flow path 9 must also be ensured, and in the method in which the opening 10 is provided on the side surface of the cylinder 7, the area of the air supply port 14 and the area of the flow path 9 are contradictory. There is a relationship where Therefore, the shape of the flow path 9 needs to adopt a flow path shape that is efficient in a determined space. In the embodiment shown in FIG. 2, the flow path 9 has a Laval tube shape. According to this embodiment, the gas flow rate can be increased by using the Laval tube shape, and the determined space can be used effectively. Since the gas flow rate is increased by increasing the gas flow rate, the shutoff performance can be improved.

第3図は、本発明の異なる実施例で、第2図と同様に斜
視図で示した。本実施例では、流路9の流路断面を四角
形としたもので、円形に比べて流路面積を大きく設定で
きる利点がある。流路面積の増大によりガス流量を増加
できる効果がある。
FIG. 3 shows a different embodiment of the invention in a perspective view similar to FIG. In this embodiment, the channel 9 has a rectangular cross section, which has the advantage that the channel area can be set larger than a circular channel. The increase in the flow path area has the effect of increasing the gas flow rate.

第4図は、さらに異なる実施例で、開口部8の形状を台
形の四角形としたものである。このようにすることで、
開口部8が排気ガイド12の排気口15に達する際に、
開口部8の開口面積を急速に増すことができる。よって
、開口部8の開口直後から安定した遮断性能が得られる
FIG. 4 shows a further different embodiment in which the opening 8 has a trapezoidal quadrangular shape. By doing this,
When the opening 8 reaches the exhaust port 15 of the exhaust guide 12,
The opening area of the opening 8 can be rapidly increased. Therefore, stable blocking performance can be obtained immediately after the opening 8 is opened.

〔発明の効果〕〔Effect of the invention〕

本発明によれば、可動側流路形状の改善により遮断性能
を向上できるため、さらに、大容量化を図ったガス遮断
器を提供することができる。
According to the present invention, since the breaking performance can be improved by improving the shape of the movable side flow path, it is possible to provide a gas circuit breaker with further increased capacity.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は、本発明の一実施例のガス遮断器遮断部の縦断
面図、第2図は、第1図の可動子台の斜視図、第3図は
、本発明の異なる実施例の可動子台の斜視図、第4図は
、本発明のさらに異なる実施例の可動子台の斜視図、第
5図ないし第7図は、従来技術例を示すガス遮断器の動
作説明図である。 3・固定子、4・・可動子、5 絶縁ノズル、6中空ノ
ズル、7・・・シリンダ、7a・可動子台、8第 図 第5図 第2図
FIG. 1 is a longitudinal sectional view of a gas circuit breaker interrupting section according to an embodiment of the present invention, FIG. 2 is a perspective view of the movable child base of FIG. 1, and FIG. 3 is a diagram of a different embodiment of the present invention. FIG. 4 is a perspective view of a movable base according to another embodiment of the present invention, and FIGS. 5 to 7 are explanatory views of the operation of a gas circuit breaker showing examples of the prior art. . 3. Stator, 4. Mover, 5 Insulating nozzle, 6 Hollow nozzle, 7. Cylinder, 7a. Movable base, 8 Fig. 5 Fig. 2

Claims (1)

【特許請求の範囲】 1、固定子、可動子と、前記可動子と一体に動作するシ
リンダと、前記シリンダ内の消弧性ガスを前記固定子と
前記可動子間に導く絶縁ノズルとを備え、前記可動子に
設けた中空ノズルからの流路の開口部を前記シリンダの
側面に配置したガス遮断器において、 前記流路をラバール管形状としたことを特徴とするガス
遮断器。 2、請求項1に記載のものにおいて、前記流路の断面形
状を四角形としたガス遮断器。
[Claims] 1. A stator, a movable element, a cylinder that operates integrally with the movable element, and an insulating nozzle that guides arc-extinguishing gas in the cylinder between the stator and the movable element. A gas circuit breaker in which an opening of a flow path from a hollow nozzle provided in the mover is arranged on a side surface of the cylinder, wherein the flow path has a Laval tube shape. 2. The gas circuit breaker according to claim 1, wherein the flow path has a rectangular cross-sectional shape.
JP2961090A 1990-02-13 1990-02-13 Gas breaker Pending JPH03236128A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2961090A JPH03236128A (en) 1990-02-13 1990-02-13 Gas breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2961090A JPH03236128A (en) 1990-02-13 1990-02-13 Gas breaker

Publications (1)

Publication Number Publication Date
JPH03236128A true JPH03236128A (en) 1991-10-22

Family

ID=12280837

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2961090A Pending JPH03236128A (en) 1990-02-13 1990-02-13 Gas breaker

Country Status (1)

Country Link
JP (1) JPH03236128A (en)

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